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or am i just thinking of somthing that is totatly not sudoku related.

- Chessmaster
**Posts:**191**Joined:**21 December 2005

May be these?

http://en.wikipedia.org/wiki/Chain_rule

http://mathworld.wolfram.com/ChainRule.html

A very beautiful theorem.

http://en.wikipedia.org/wiki/Chain_rule

http://mathworld.wolfram.com/ChainRule.html

A very beautiful theorem.

- Mauricio
**Posts:**1174**Joined:**22 March 2006

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